Refactor overriding wread, wwrite, wwritedata repo methods - restrict consistently to reading/writing in working dir - no cludgy sys.argv parsing anymore Eases collaboration with other extensions, or external tools like TortoiseHg. Changes in behaviour: - hg cat does not expand; will be implemented with new kwcat command - no expansion in web /display/, only in downloaded archives Thanks to Jesse Glick for inciting this approach.